26448-34-0

Basic information

• Product Name: 1,1,2,2-Tetrabromo-1,2-dihydrobenzocyclobutene
• Synonyms: 1,1,2,2-Tetrabromo-1,2-dihydrobenzocyclobutene;7,7,8,8-Tetrabromobicyclo[4.2.0]octa-1,3,5-triene
• CAS NO: 26448-34-0
• Molecular Formula: C₈H₄Br₄
• Molecular Weight: 419.73
• Mol File: 26448-34-0.mol
• Article Data: 2

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 1,1,2,2-Tetrabromo-1,2-dihydrobenzocyclobutene(CAS DataBase Reference)
• NIST Chemistry Reference: 1,1,2,2-Tetrabromo-1,2-dihydrobenzocyclobutene(26448-34-0)
• EPA Substance Registry System: 1,1,2,2-Tetrabromo-1,2-dihydrobenzocyclobutene(26448-34-0)

Safety Data

• Hazardous Substances Data: 26448-34-0(Hazardous Substances Data)

Upstream product

• 22250-72-2 7,8-Dibromobicyclo<4.2.0>octa-1,3,5-trien 

Downstream Products

• 787-26-8 5,6-dibromobenzobiphenylene 
• 107369-38-0 7,12-diphenylacenaphtho<1,2-b>biphenylene 
• 107369-39-1 8,13-dibromo-7,14-diphenylbenzoacenaphtho<1,2-e>cyclo-octene 
• 107369-36-8 1-methyl-2,3,4-triphenylbiphenylene 
• 107369-37-9 2,3-dimethyl-1,4-diphenylbiphenylene 
• 107369-33-5 7-benzoylbenzobiphenylene 
• 128174-79-8 2-(4-bromophenyl)-1(2H)-phthalazinone 
• 107369-35-7 1,2,3,4-tetraphenylbiphenylene 

Relevant articles and documents

How aromatic are the benzene rings in biphenylene? The synthesis and NMR properties of a biphenyleno fused dihydropyrene

The synthesis of the biphenylene fused dihydropyrene 2 is described by cycloaddition of dibromobenzo-cyclobutadiene with the oxa[17]annulene 3 and deoxygenation of the adduct with Ti(0). Analysis of the NMR data indicates that biphenylene has about 55% of the relative bond fixing ability of benzene, which is equated to relative aromaticity. The experimentally determined Dewar resonance energy is 1.59 times that of benzene, while Dewar calculates 1.55 times benzene.